A voltage ratio-based efficiency control method for 3 kW wireless power transmission

Author

Ishihara, H. ; Moritsuka, Fumi ; Kudo, Hiroyuki ; Obayashi, Shigeru ; Itakura, T. ; Matsushita, Akira ; Mochikawa, Hiroshi ; Otaka, S.

Author_Institution

Corp. R&D Center, Toshiba Corp., Kawasaki, Japan

fYear

2014

fDate

16-20 March 2014

Firstpage

1312

Lastpage

1316

Abstract

This paper presents a novel control method for wireless power transmission (WPT). The proposed method can maximize the power efficiency only by controlling the voltage ratio between the primary and the secondary side. Experimental measurement results of the prototype system with 3 kW power transmission show the efficiency difference between the proposed control method and the available maximum value is less than 0.3 % even with a large variation of coil-to-coil distance and load voltage. The automatic controller for the proposed method provides the load-following operation, maintaining both constant power and high efficiency, using a WLAN connection.

Keywords

coils; radiofrequency power transmission; wireless LAN; WLAN connection; WPT; automatic controller; coil-to-coil distance; load-following operation; power 3 kW; power efficiency maximization; voltage ratio-based efficiency control method; wireless power transmission; Automatic voltage control; Couplings; Prototypes; Resistance; Voltage measurement; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803476

Filename

6803476